Liquid-fuel-feeding device for rotary oil burners



June 16, 1925.- 1,542,531

J sCHEMlNGER, JR

LIQUID FUEL FEEDING DEVICE FOR ROTARY OIL BURNERS 1 Filed Aug. 20. 2 '2 Sheets-Sheet 1 Dam/W- I yafi 0 arr/6y June 16, 1925. 1,542,531

J. SCHEMINGER, JR

LIQUID FUEL FEEDING DEVICE FOR ROTARY OIL BURNERS Filed Aug. 20, 1925 2 Sheets-Sheet 2 Patented June 16, 1925. I

fuel s1 of the UNITED STATES A 1,542,531 PATENT OFFICE.

JOHN SCHEMINGER, JR., OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO AIETNA AUTOMATIC OIL BURNER, INCORPORATED, OF NEW YORK, N. Y., A. CORPORATION on NEW YORK.-

IiIQUIDrFUEIJ-FEEDIN'G DEVICE FOR ROTARY OIL BURNERS.

Application n August 20, 1923. Serial No. 658,444.

Liquid-Fuel-Feeding Devices forRotary Oil Burners and I do hereby declare the following to'be a full, clear, and exact description of the invention, such as will enable tains to make and use. the same.

This invention relates to devices for feed ff mg liquid fuel to rotary oil burners, orthe] like, and more particularly to devices of the character referred to in which the liquid ply tank-is located'above the level urner; -'In the o eration of pump-fed rotary oil burners ,3? en the liquid fuel isconducted direct fromiche pump to the burner, the agitation or pulsatory action produced by the pump: piston on the moving column of liguid seriously interferes with the operation o the burner, resulting at times in extinguishingthe flame. c-

The primary object of myinvention is to overcome this difliculty and'provide'simple, inexpensive, reliableand efiicient means for effecting a stead anduniform feed or flow of, the liquid e'l' from a pump'to the burner, 'or other device with which my in-' vention may be used, unaffected by the pulsationsio fthe pump as in pump-fed liquid fuel burners as heretofore ordinarily con structed, such means including "a separating and quietin apparatus whereby a. portion of the liqui in'1ts passage from the pump to the burner is separated from the major portionand caused to descend and flow quietly'to-the burner'unafiected by the agitation or pulsations produced by the pump piston, while the larger portion is returned to the'supply tank or so'urc'e fr0m which it came; I

v A further object is to provide sim 1e and eflicient means to prevent the tan from beingemptied by siphonic action, Wl110l1 1S sometimes set up when the pump is stopped, and. in case of e I The invention will first be hereinafter more particularly described,"with reference to' the accompanying drawings, which are to be taken as a part of this specification,

said apparatus others skilled in the art to which it apper-I;

"and an auxiliary chamber akage in: the pipe line.

\ and then pointed out in the claims at the end 'of the description.

In said drawings, I v F1g. 1 is a side elevation, partly in section, of an apparatus embodying my invention, including a fuel supply tank, a pump, a liquid fuel separating and quieting apparatu's and plfpe-connections between the same, anda' uel feed pipe leading from to a burner or other device (not s own).

, Fig. 2is a vertical sectional view of the se aratmg andquieting apparatus; and

as ig. 3 1s a lan view of said apparatus, the top thereo being removed. I

Referring to said drawings, in which the same reference characters are used to denote corresponding parts 1n different views,

thei letter A'denotes a liquid fuel separating an pipe ine between a supply tank L and a pump P; said tank being elevated above the level of a rotary oil burner or other device (not shown) with which the apparatus is used. The tank L is connected with the pump P by means of a suction pipe 1%}, preferably through a priming chamber such as shown, for example, in my Patent No.

quietingapparatus interposed in the 1,442,787 dated January 16, 1923, but such priming chamber may be dispensed with.

The separating and quieting apparatns'is provided with a surplus lkkuid chamber A the chamber A having'a partition 21 therein which terminates a suitable distance below the top of said chamber for the purpose hereinafter described, while thechamber A is provided the top or cover-plateau of the auxiliary chamber. The auxiliary chamber at one side of-the partition a is connected by a pipe D with the outlet or discharge from the pump P, and at the other side of said partition a fuel feed pipe E leads to the burner, said 'pipe'E having a valve e therein for vregulating the supply of fuel to. the burner.

:with '-a partition a which terminates near a there is a pipe section G leading from said chamber into the suction pipe B; the end of the pipe section which enters the bottom of the chamber havingan invertedcup-like cap 9' thereon-which has a .vent opening 7 therein for a purpose hereinafter described. The top (7. of the auxiliary chamber A is removably securedby means of set screws a, or other suitable fastening means, and has an opening therethrough in having a hole in its bottom through which protrudes a nipple in at one end of a pipe section K, projecting from a valve casing M arranged in the auxiliary chamber; said' valve casing having on the under side thereof a tubular boss on which is interiorly threaded and screwed upona reduced and threaded end of the fuel feed pipe E, the

' adjacent portion of whiclnbelow the bottom of the chamber, is threaded to receive a lock nut for securing it to said bottom. The valve chamber M is provided-with a suitable stuffing box through'which the stem h of the valve H passes into said chamber and rests upon a valve seat arranged directly over the outlet end of the fuel feed pipe E, for discharging a portion of the fuel entering the separator into the pipe E through which it is conducted to the burner, or other device, by gravity, so that sufficient pressure is maintained at the delivery end of said pipe to effect a steady and uniform supply of fuel to the burner.

In operatiom'the liquid entering the auxiliary chamber or compartment A through the pipe D, rises in the space between the partition (I2 and the outer wall of the auxiliary chamber and flows over said partition into the space at the other side thereof, filling the latter space and the strainer therein, and raising the valve H, and with it the valve h and the liquid which enters the strainer will escape through the valve 71- and pass to the burner while the larger portion passes through the valve Hinto thecompartment.

A and from thence to the tank L. The body of the valve H fits loosely in the opening through the top plate a and has a headportion'or flange k thereon which seats snugly upon the top plate by gravity when the pump is stopped and the fluid pressure in the separating device is reduced. As the oil entering the auxiliary chamber passes over the top of the partition a? therein and into the space on-the other side of said-partition and out through the valve H, it is broken up sufficiently to cause a separation of the globules of air contained therein and the smaller portion of the liquid fuel is thereby condensed passage thereof quietly, continuously and.

evenly to the burner or other device with i which the apparatus is used. unaffected by the pulsations or irregular movements of the pump piston or pistons.

In the event of leakage in the pipe line when the pump is stopped and the burner extinguished, siphonic action may be set up and the contents of the supply tank emptied, with consequent loss and danger to the premises in which the apparatus is used, and to prevent this the vent overlying the pipe connection with the suction pipe is provided, so that when the liquid in the compartment A or that part of said compartment between the partition (1 and the inner wall of the compartment falls below the vent 9 air will be admitted through said vent opening and caused to enter the suction pipe, thus breaking the siphon.

It will be understood of course that the invention is not restricted in its application to rotary oil burners, but may be used for feeding liquid fuel generally to any device with which it is desired to use the same, and the appended claims should be read with this Y understanding.

' Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. In combination with a liquid fuel sup- ,ply tank, a pump, and a separating device,

a suction pipe connecting said pum with said tank, a return pipe connecting saic pump with said separatingdevice. a surplus fuel return pipe connecting said separating device with saidtank, and a fuel feed pipe connecting said separating device with a burner or the like; said. separating device comprising a receptacle having a main and an auxiliary liquid chamber therein, the latter having a top-plate or cover and provided with 'a re ceiving chamber at one side and a separating chamber on the other side thereof, andmeans in said separating chamber whereby a part of the liquid drawn from said tank is fed to a burner or other device while the larger portion is returned to the tank; said means comprising a lift valve slidably fitted in an opening through the top of the separating with said separatin chamber and adapted to be opened by fluid pressure, an outlet valve of smaller capacity than said lift valve arranged below said opening and controlling the admission of fuel to said feed pipe, a strainer suspended n said separating chamber, and a pipe leadmg from said strainer to said feed pipe; said outlet valve beingmovable with and controlled by said lift valve for opening and closing the outlet through said feed pipe when said lift valve is raised and lowered.

2. In combination with aliquid fuel supply tank, a pump, and a separating device, a suction pipe connecting sa1d tank with said pump, a return pipe connecting said pump device, a surplus fuel return pipe connectin' said separating device with said tank an a fuel feed pipe connecting said separating device with a burner or the like; said separating device comprising a receptacle having a main and an auxiliary liquid chamber each having a partition therein to provide a liquid chamber of reduced size on each side of each partition,

the auxiliary chamber having a top-plate or cover with a strainer suspended therefrom, a fluid ressure actuated lift valve slidably fitted in an opening through said cover, a valve chamber below said opening in communication with the fuel feed pipe, a tube projecting froin, said valve chamber into said strainer, and an outlet valve of less capacity than said lift valve seated in said valve chamber and. movable with and controlled by said lift valve, for opening the outlet through said feedpipe when said lift valve is raised.

3. In combination with a liquid fuel supply tank, a; pump, and a separating device, a suction pipe connecting sa1d tank with said pump, a returnpipe connecting said pump with said separating device, a surplus fuel return pipe connecting said separating device with said tank and a fuel feed pipe connecting said separating device with a burner or the like; said separatingdevice comprising a receptacle having a main and an auxiliary liquid chamber each having a valve of less capacity than said lift valve seated in said valve chamber and movable with and controlled by said lift valve, for opening the outlet through said fwd pipe when said lift valve is raised; said return pipe entering said auxiliary chamber on one side of the partition therein and said fuel feed pipe leading from said chamber on the other side of said partition, and said surplus fuel return pipe leading from said main liquid chamber at one side of the partition therein, and a pipe connection at the other side of said partition leading into said suction pipe and provided with means whereby air is admitted to the suction pipe when the liquid' in said main chamber falls below a predetermined point, so as to prevent the tank from being emptied by siphonis action. 4. An apparatus of the character described comprising a liquid fuel supply tank, a pump, a separating device, and suitable pipe connections between said pump and tank and between said separating device and said pump and said tank and a burner or the like,

-through which pipe connections liquid fuel may be drawn from said tank and fed in part to a burner or other device andthe remaining portion returned to the tank; said separating device comprising a receptacle having a main and an auxiliary liquid chamber'therein, the latter chamber having a removable top-plate or cover and partitioned to provide-at one side a receiving chamber and at the other side a. separating chamber, said separating chamber containing a fluid pressure actuated lift valve slidably fitted in an opening through said cover, an outlet valve of less capacity than said lift valve protruding into a valve chamber arranged below said opening and controlling the outlet into the fuel feed pipe, a strainer in the upper part of the separating chamber, and a discharge pipe projecting from said valve chamber into said strainer; said outlet valve being movable with and controlled by said lift valve for opening the outlet through said feed pipe when said lift valve is raised.

5. In combination with a rotary oil burner, a liquid fuel supply tank located above the burner, a separating device located above said tank, a pump, pipe connections between said pump and tank and between said separating device and pump and tank and the drawn from said tank is fed to the burner and the remaining portion returned to the tank: said separating device comprislng a receptacle having a main and an auxiliary liquid chamber, the latter having a top-plate or cover anda partition therein to provide a receiving chamber at one side and a separating chamber on the other ,side of said partition, said main chamber also havin a.

partition therein to provide a liquid chain er of reduced size on each side of its partition; said separating chamber having a strainer therein and a fluid-pressure-actuated lift valve slidably fitted in an opening through its' top, a valve chamber arranged below said opening in communication with the fuel feedpipe and havin a tubular projection protruding into sai strainer,an outlet valve 111 ing into the suction pipe and provided'witlf means for admitting air to the suction pipe whenthe liquid in said main chamber falls below a predetermined point, so as to prevent the tank from being emptied by siphonic action.

6. A liquid fuel feeding apparatus comprising a supply tank, a pump, a separating device and pipes connecting saidpump and tank and said separating device with said pump and tank and with a burner, through which pipes a part of the fuel drawn from the pump is returned to the tank and another part fed to the burner; said separating device comprising a receptacle having a main and an auxiliary liquid chamber each having aremovable cover and a partition therein so as to provide liquid chambers on opposite sides of each partition, a suction pipe connecting said tank with the inlet to said pump, a surplus fuel return pipe leading from said main chamber at one side of the partition therein into said tank, a pipe-connection between said suction pipe and said main chamber, on the other side of the partition therein, provided with avent opening for admitting air. to said suction pipe when the liquid in the chamber with which it connects falls below a predetermined point, a fuel return pipe connecting said pump with the auxiliary chamber of said separating device at one side of the partition therein, a fuel feed pipe leading from the other side of said partition to a burner or other device, and separating means in said auxiliary chamber whereby liquid fuel entering said auxiliary chamber is caused to pass through said lift valve into said main chamber and thence to the tank while a smaller portion is caused to p i through said strainer and said valve chamber into said feed pipe for delivery to the burner; said separating means comprising a lift valve slidably fitted inan opening inzthe top of said auxiliary chamber, a valve fiainbje'r below saidopening having a valve thereinllfjkss capacity than said lift valve and injfififle therewitln-for closing the outlet to said feedlpipe, astrainer in said auxiliary chamber and a pipe. leading from said strainer into said valve chamber.

7, In combination with a liquid fuel supply tank, a pump, and a separating device, a suction pipe connecting said tank with said pump, a return pipe connecting said pump with said separating device, a surplus fuel return pipe connecting said separating device with said tank and a fuel feed pipe connecting said separating device with a burner or the like; said separating device comprising a receptacle having a main and an auxiliary liquid chamber each having a partition therein to provide a liquid chamber of reduced size on each side of each partition, the auxiliary chamberhaving a topplate or 'cover provided with an opening therein, a fluid pressure actuated lift valve slidably fitted in saidopening, a valve chamber below said opening in communication with the fuel feed pipe and with the liquid chamber in'which it is placed, and an outlet valve of less capacity than said lift valve seated in said valve chamber and movable with and controlled by said lift valve, for opening the outlet through'said feed pipe when said lift valve is raised.

In testimony whereof I affix my signature in the presence of two witnesses. JOHN SCHEMINGER, JR.- Witnesses: B. M. OFFU'I'I,

THOMAS F. BURKE. 

